A coastal town needs a mean electrical power of at least 15 MW during each of four six-hour periods. Engineers are considering a tidal scheme or a gas power station.
The table gives the mean power output of each scheme.
| Six-hour period | Tidal scheme mean power output in MW | Gas power station mean power output in MW |
|---|---|---|
| 00:00 to 06:00 | 18 | 20 |
| 06:00 to 12:00 | 6 | 20 |
| 12:00 to 18:00 | 17 | 20 |
| 18:00 to 24:00 | 4 | 20 |
Evaluate whether the town should choose the tidal scheme rather than the gas power station. Use the data and compare the environmental impacts of the two schemes.
86 exam-style questions on AQA GCSE Physics 1.3 National and global energy resources, covering 1.3 National and global energy resources. Each one has a worked solution and a mark scheme showing where the marks go.